<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card class="box-card">
      <el-button
        type="primary"
        class="el-icon-back"
        size="mini"
        style="margin-bottom:15px"
        @click="$router.back()"
      >返回</el-button>
      <!-- 头部提示 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      ></el-alert>

      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex-0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        :model="addForm"
        :rules="addForm_rules"
        ref="addForm_ref"
        label-width="100px"
        label-position="top"
      >
        <!-- tab栏区域 -->
        <el-tabs
          tab-position="left"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClick"
        >
          <el-tab-pane
            label="基本信息"
            name="0"
          >
            <el-form-item
              label="商品名称"
              prop="goods_name"
            >
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item
              label="商品价格"
              prop="goods_price"
            >
              <el-input
                v-model="addForm.goods_price"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item
              label="商品重量"
              prop="goods_weight"
            >
              <el-input
                v-model="addForm.goods_weight"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item
              label="商品数量"
              prop="goods_number"
            >
              <el-input
                v-model="addForm.goods_number"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item
              label="商品分类"
              prop="goods_cat"
            >
              <!-- 级联选择框 -->
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                clearable
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            label="商品参数"
            name="1"
          >
            <el-form-item
              class="params-item"
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  v-for="(item2,index2) in item.attr_vals"
                  :key="index2"
                  :label="item2"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            label="商品属性"
            name="2"
          >
            <el-form-item
              class="params-item"
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            label="商品图片"
            name="3"
          >
            <!-- 上传图片 -->
            <!-- action图片要上传的地址 -->
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :headers="headerObj"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success="handleSuccess"
              list-type="picture"
            >
              <el-button
                size="small"
                type="primary"
              >点击上传</el-button>
              <div
                slot="tip"
                class="el-upload__tip"
              >只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane
            label="商品内容"
            name="4"
          >
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button
              type="primary"
              @click="add"
              style="margin-top:15px"
            >添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img
        :src="previewPath"
        style="width:100%"
        alt
      />
    </el-dialog>
  </div>
</template>

<script>
import categories from '../../dataSource/categories'
import _ from "lodash";
export default {
  created() {
    this.getCateList();
  },
  mounted() {},
  data() {
    return {
      activeIndex: "0",
      //   添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品分类数组
        goods_cat: [],
        pics: [],
        // 商品详情描述
        goods_introduce: "",
        attrs: []
      },
      addForm_rules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" }
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" }
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" }
        ],
        goods_number: [
          { required: true, message: "请输入商品重量", trigger: "blur" }
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" }
        ]
      },
      // 商品分类数据
      cateList: [],
      cateProps: {
        expandTrigger: "hover",
        label: "cat_name",
        value: "cat_id",
        children: "children"
      },
      manyTableData: [],
      onlyTableData: [],
      //   图片上传组件请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem("token")
      },
      previewPath: "",
      previewDialogVisible: false
    };
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    }
  },
  methods: {
    //   获取商品分类数据
    async getCateList() {
      // const { data: res } = await this.$http.get("categories");
      const { data: res } =categories;
      // if (res.meta.status !== 200) {
      //   return this.$message.error("获取商品分类数据失败");
      // }
      this.cateList = res;
    },
    // 级联选择器变化触发
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    //
    beforeTabLeave(activeName, oldActiveName) {
      // activeName将要进入的标签页名字
      // oldActiveName将要离开的标签页名字
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    // tab 被选中时触发
    async tabClick() {
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" }
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = res.data;
      }
      if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" }
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态属性失败");
        }
        this.onlyTableData = res.data;
      }
    },
    // 点击图片标题预览触发
    handlePreview(file) {
      // console.log(file);
      this.previewPath = file.response.data.url;
      this.previewDialogVisible = true;
    },
    //
    handleRemove(file) {
      const filePath = file.response.data.tmp_path;
      const i = this.addForm.pics.findIndex(v => {
        v.pic === filePath;
      });
      this.addForm.pics.splice(i, 1);
    },
    // 图片上传成功触发
    handleSuccess(res) {
      const picInfo = {
        pic: res.data.tmp_path
      };
      this.addForm.pics.push(picInfo);
    },
    // 点击添加商品按钮
    add() {
      this.$refs.addForm_ref.validate(async valid => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项");
        }
        // 执行添加商品操作
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" ")
          };
          this.addForm.attrs.push(newInfo);
        });
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join
          };
          this.addForm.attrs.push(newInfo);
        });
        form.attrs = this.addForm.attrs;

        // 发起请求，添加商品，商品名称必须是唯一的
        const { data: res } = await this.$http.post("goods", form);
        if (res.meta.status !== 201) {
          return this.$message.error("添加商品失败");
        }
        this.$message.success("添加商品成功");
        this.$router.push("/goods");
      });
    }
  }
};
</script>

<style scoped lang="less">
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
</style>
